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Abstract

Using experimental samples of type-KI quartz glass processed in a barostatic chamber as an
example, it is demonstrated that bubbles can be removed from it virtually completely. An
investigation of the quality indices (birefringence, fine-grain inhomogeneity, and refractive
index) recorded that they showed substantial variations after each operation, from the time that the
glass was fabricated from quartz until the final product was obtained after the barostatic
chamber, hot pressing, and rough annealing. However, the indices returned to their initial values
at the completion of the processing cycle.